Best 50 or 52 inch Panasonic TV

[lazydays]

Stavs (or anyone who can answer), can you confirm that the PS55ST50 is 51" wide? I've found amazon dimensions to sometimes be inaccurate.

Do you know if the volume control on the tv works when using a digital to analog converter?

Last, I have dishHD but lots of content is still in standard def. Does it look acceptable on the 55 or would it be better to stick with the 50"?

Thanks